The only thing that I can see missing in that document is in the third image, it doesn't specify what to set the OCIO view to - make sure it's set to sRGB. Other than that everything looks fine.
With those settings, it is expected that colors used in textures will not produce the same colors in the render output, because of the ACES tone mapping being applied. If you want the colors to round-trip you will need to not apply any sort of curve to the image.
If everything works in C4D then it sounds like there might be a problem with the Maya plugin. I'm afraid I can't help you there but at least that narrows it down.